Exhaust-muffler.



PATENTED4 JAN. Us, 1905. A. BUGHNBR & B. P. MOGLURB.

EXHAUST MUFFLER.

APPLIUATION FILED MAB. 9, 1904.

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Patented January 3, 190 5.

MCCLURE, GF' CHICAGO, ILLINOIS.

EXHAUSTHMUFFLER.

SEGIFXGATIQH forming peut of Letters Patent No. 77

9,D24=, dated January 3, 1905.

Application filed Morell `9, 1904. vSerial NoK 197.262.

To v:whom/'it may concern: n,

,Re .it .known that we, Animer BUGHNER end "tminu l). McCLURn, citizens of the United tes, residing); ut Chicago, in the county of ooh und Stute ci' illinois, have invented new '.limprevenientsinExheustdtilutllers; which the Aiol Cliiis inv, ou relates to improvements in enheiistunuilflers used for the purpose of olif' teining noiseless exhaustq und is more especielljv intended forvnporengines und smell motors used in automobiles. und has for its object to provide ri/device of this character that will eectuelly deaden the sound oi the escaping exhaust und at the same time avoid compression or bach pressure on the motor.

the drawings. Figure l is u longitudinal sectionoiE a. device embodying the improved .fi'tures. Fig. isa transverse section on line i, .looking in the direction indicated by the errow. Fig'. 3 is e transverse section on iine Fin'. l; sind 4 is e modification.

' represents en exhaust head or receptacle 1L wl'iieli will usually he of the cylindrical form shown. itisohvious, however, that any forni oii r' -otecle may he used that is liest adepted 'for the purposec The receptaclel is 'pro- -vided with e number or' purtitions or dieohregin il, disposed at intervals and dividing; the interior space into compartments 5., 6, T, und Each of the partitions are -provided ith u hollow contracting-dome 9, having' a.

number of perioretions l() for the eseaipe therethrough of the exhaust into the next com intr-tinent oe its wey to the discharge end of the receptacle'. The exhaust-pipe l1 from the noter is inserted in the-closed' receivingl end of the receptacle sind exhausts into the compartment 5.,which presents u much greater i diameter of the exnrezi in proportion tothe huusopipe, so th t the exhaust product will he greatly expanded ind gruduelli7 escapes into the next compartment 6 through the peromH time il) "ii thedenic,` where it is still Afurther espeiicled. This operation continues through eine end iisnsion-oompnrtmont until i coro ent is reached Iend. .frein is-inallj; discharged into e tl oug'h a number of sietuied in 'the closed circumferlowing is e specilicution. fr

ential discharge end 14.- ot' the receptacle. as best shown .in Fig. 3. The combined aree of the perforutions in the domes vis much less thanthut of the zueu oi the compartments in which the denies ure located, thus contractino,l the passage from one compartment tothe next in the order 'of succession und prevent the'iiow from. becoming;l too rapid. this arrangement the eXlniust-:guses ure so graduellyA and continuously expanded that when the exhaust is linnlly dischiirged into the utmosphere no furthcrcxpansion is possible und the result is u noiseless exhaust. lhe cornhined slotopeuing's give se greet u discharge aree as to spread the exhaust out into a, thin sheet. The expansion und escupe of the exhaust from the receptacle will he rapid enough to ulwuys insure e tree exhaust und prevent the liability of buch pressure checking` the workingcupacity of the motor. The diameter of the perth tiorrdoiues is less than that et' the inclosiug receptacle und greater than that of the exhnust-pipe connecting with the motor, so that it is e very simple metter to properly proportion these parts in accordance with the capncf ity ot the motor in securing` a, noiseless exheust. The number und uren of the perforattions in the diderent domes must also he teken inte consideration in bringing about the de sired result. "lhe number of partitions und exhaust-chambers may also he variedwithout departing from the spirit of the invention.

Fig. e is :i modification in that the partitiondoine therein shown is provided witlilong'itudinal openings 15 instead of the round holes in the domes inclosed in the exhaust-receptacle.

Having thus described our invention, what we cleifn isM l. An exhziust-n'iuillcr, comprising e cylindrical casing,` e number oli' impor-torete pertitions located .therein et intervals and provided with perforated denies extending into the conpfirtinents between said partitions, un d the elongated ekliausuopenings.

An exhaust-iuuillor. .ouiprisingu cylindrical receptacle` e number or' iinperiorute purtitions inserted in and dividing Suid receptacle `into u number ofccunpartinents7 each of seid partitions being provided with n perforated IOO said'ompartments, the exhaust-inleconnee stionQand the elongated exhaustaperture opening'outward from the last compartment'.

l B. An exhaustinuler, comprising a recep- 5 tacle having partitions located therein transversely and dividing the same into a number of compartments, each of said partitions being provided with'a perforated dome an exliaustpipe inserted in one end -of said recepy.w tacleand the elongated openings in the dis,-

chargeend opening outward from the last compartment, each of said domes beingof a greater diameter than the exhaust-pipe but less than that of the inclosing receptacle.

I5 4. In an exhaust-mller, the combination with a cjlindricalreceptacle, of a nnmbero partitions located therein and dispcsed at intervals in dividing. the cylinder into compart-v ments, each partition being provided centrally. j l 2O with a perforated don'jge opening into the compartmets,the inlet connection and the exhaust i end provided: with elongated openings.

' In `testimony whereof We have signedour names to this specification in the presence ofl 

